What exchanges can you buy iota on in the USA?
You can buy thru their slack channel.
https://slack.iota.orgBuying there is a bit stressful because it's quite complicated because they are using trading bot. So when depositing an amount, make sure you have not missed anything because youll lose your funds if its not the exact amount you entered. Anyway, you need an invite in able to enter their slack channel. It's on you to find out how. If still you can't find out how. Then try these markets
https://coinmarketcap.com/currencies/iota/#marketsIota is now 5th at the coin marketcap. I think it will surpass XRP market cap and make it to the 4th before this year ends.
Why to use their Slack channel to buy iota? It's in bitfinex and couple more exchanges if you want to buy. The market of iota is depth enough in there and you can easily buy from those exchanges. No need for slack thing for buy it.